What is the general equation of an ellipse centered at (h, k), with semi-major axis a, semi-minor axis b, and the foci located at (h ± c, k), where c = √(a^2 - b^2)?
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What is the value of sin(θ) if θ is an acute angle in a right triangle with a hypotenuse of 10 cm and an opposite side of 6 cm?
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What is the value of arcsin(sin(π/4)) + arctan(tan(3π/4))?